MQTT over Wireguard

[proasnet]

Hello everyone.
I am struggling with connecting a remote MQTT client using Wireguard.
Wireguard works for me in HA, I establish a connection from a mobile phone or from ESP32.
I can't get any further. In ESP I have the pubsubclient library, all set up, and yet MQTT data is not going through (port 1883).
So I tried the android app, MQTT client, I entered the familiar MQTT credentials and it won't connect.
I think the problem will be with the port setting in the Wireguard add-on for the client.
Can you help me, please?

Setting up the wireguard plugin:
server

host: jirutka.ddns.net
addresses:
  - 10.10.10.1
dns: []
log_level: debug

peers

- name: hassio
  addresses:
    - 172.27.66.2
  allowed_ips: []
  client_allowed_ips: []
- name: esp01
  addresses:
    - 10.10.10.10
  allowed_ips: []
  client_allowed_ips: []
- name: samsung
  addresses:
    - 10.10.10.2
  allowed_ips: []
  client_allowed_ips: []

log

peer: FVoP26kTOD7vjHzD2uGGiA4uOUoYvVuLck2PGFrFGys=
  allowed ips: 172.27.66.2/32
  persistent keepalive: every 25 seconds
[11:03:14] INFO: Requesting current status from WireGuard...
interface: wg0
  public key: /hNBOOzm9YwtyvHMwkbbXnZhJZJ5idygDVHupy4SVkA=
  private key: (hidden)
  listening port: 51820

peer: X6sV3DqdrHDw9fcgH5ph2h4TpbJmRgkRdWruQIVwMEM=
  endpoint: 46.34.238.202:34604
  allowed ips: 10.10.10.2/32
  latest handshake: 38 seconds ago
  transfer: 418.47 KiB received, 5.12 MiB sent
  persistent keepalive: every 25 seconds

peer: QwnBmWnlglhFy+7AIP/PH8dpnC9vPjf6g7qizTtlVTs=
  endpoint: 212.5.222.94:51820
  allowed ips: 10.10.10.10/32
  latest handshake: 16 minutes, 52 seconds ago
  transfer: 2.77 KiB received, 23.91 KiB sent
  persistent keepalive: every 25 seconds

Thank you very much.